import numpy as np
import matplotlib.pyplot as plt
(high_price,lo_price) = np.loadtxt('stock.csv',delimiter=',',usecols=(3,4),unpack=True)
shuju1 = high_price[:30]
shuju2 = lo_price[:30]

t = np.arange(len(shuju1))
plt.plot(t,shuju1,lw=1)
plt.plot(t,shuju1,'pr')
plt.plot(t,shuju2,lw=1)
plt.plot(t,shuju2,'pr')
plt.show()

